Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.
Aptitude
Alligation or Mixture
Choose an option
-
A1:3
-
B2:3
-
C3:4
-
D4:5
Answer
Correct Answer: 2:3
Explanation
Given:
- Price of first rice = Rs. 7.20/kg
- Price of second rice = Rs. 5.70/kg
- Mean price of mixture = Rs. 6.30/kg
Apply alligation rule:
Ratio = (High - Mean) : (Mean - Low)
= (7.20 - 6.30) : (6.30 - 5.70)
= 0.90 : 0.60
= 3 : 2
Answer: 3 : 2
That means rice at Rs. 5.70/kg and Rs. 7.20/kg should be mixed in the ratio 3:2.